Reverted fix away from 4.0, because it may in rare circumstanses

cause compatibility problems. Fix will be enabled in 4.1.

sql/sql_parse.cc

@@ -2892,17 +2892,23 @@ bool add_field_to_list(char *field_name, enum_field_types type,
 	DBUG_RETURN(1);
       }
     }
+#ifdef MYSQL41000
     else if (type_modifier & AUTO_INCREMENT_FLAG)
     {
       net_printf(&thd->net, ER_INVALID_DEFAULT, field_name);
       DBUG_RETURN(1);
     }
+#endif
   }
   if (!(new_field=new create_field()))
     DBUG_RETURN(1);
   new_field->field=0;
   new_field->field_name=field_name;
+#ifdef MYSQL41000
   new_field->def= default_value;
+#else
+  new_field->def= (type_modifier & AUTO_INCREMENT_FLAG ? 0 : default_value);
+#endif
   new_field->flags= type_modifier;
   new_field->unireg_check= (type_modifier & AUTO_INCREMENT_FLAG ?
 			    Field::NEXT_NUMBER : Field::NONE);